I started drinking 101.4 ounces of water about two weeks ago. I was taking ziac 10/6.25 1 tablet a day, I also exercise daily which includes high energy aerobics, walking on tread mill and outside, I also use the stair stepper and I also joined Curves two weeks ago. I ended up going to the hospital from my doctor's office because my heart rate dropped to 38 beats I was dizzy, my memory was horrible. I have been on this medication for at least 5 years and always work out. Do you think the fact that I increased my water intake cause my heart rate to drop?? I was in the hospital for 8 days, the doctors were going to put a Pacemaker in me. I am a 60 year old female and very healthy. Do not smoke or drink. I was taken off ziac, went home with no pacemaker because my heart rate went up to the 70's and has stayed there. Every heart test they did on me came back normal.